Is liquid rubber profitable to sell on Amazon United States?

The niche generates $574K/yr across 27 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +32.3%. Flapen's verdict: Worth a look (58/100).

How competitive is the liquid rubber niche?

12 brands and 103 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 83% of demand.

What do buyers complain about in liquid rubber?

Top complaints mined from reviews: Leak-Proof, Functionality-Overall, Quality-Overall. The return rate is 1.1%.

When does demand for liquid rubber peak?

Demand peaks in May; the busiest month runs 1.9× the quietest.

What does it cost to enter the liquid rubber niche?

Listings span $5.83–$492.44; the average listing price is $83.89 (sweet spot $15–$100). The average incumbent carries 4,141 reviews — the moat a new listing must climb.

liquid rubber

Worth a look

Shows low returns (1.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Great1.1%

return rate — above 5% kills the launch gate

Avg price

Great$83.89

avg listing price — sweet spot $15–$100

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Market size

Good$574K

$574K/yr · 179K searches

Competition

Good47%

top-5 click share — leaders hold, buyers still browse

Growth

Good+32.3%

90-day search growth — must beat 0% to launch

Conversion

Okay3.8%

search→purchase rate — share of searches ending in a sale

Brand share

Okay83%

top-5 brand share — brands hold most of the demand

Review moat

Bad4,140.56

avg incumbent reviews — the moat a new listing must climb

Price range

Bad$5.83–$492.44

cheapest to priciest tracked listing — scored on the share inside $15–$100

Signals High Price

According to Flapen's Amazon United States niche tracking, liquid rubber is a $574K/yr Amazon United States market (179K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in May. Verdict: Worth a look — 58/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

liquid rubber market data

Units sold / yr: 6K–8K; avg 250–500/product
Revenue / yr: $503K–$671K; units × avg price
Conversion rate: 3.8%
Avg BSR: #157
Page quality: 0%
Prime: 96%
Sponsored: 89%
Out of stock: 0.0%
Avg brand age: 61 months
Avg seller age: 159 days

Competition & brand share

The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

103

Top-5 brand share

83%

Top 20: 100%

Top-5 click share

47%

Top 20: 90%

Open market

13%

Liquid Rubber55%
Flex Seal Liquid13%
GORILLA6%
Permatex5%
WANJAO4%
Avenuebool4%
Open — no brand owns it (6 brands, 13%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +32.3% search growth over the last 90 days.

Peak months: May · busiest ÷ quietest = 1.9×

Open Trend

Top liquid rubber search terms

liquid rubber97K/yr +28.8%2.4% conv.
liquid rubber waterproof sealant48K/yr +39.8%2.9% conv.
rubber sealant19K/yr +31.9%2.3% conv.
liquid rubber sealant7K/yr +22.4%2.1% conv.
rubber sealer3K/yr +54.3%2.7% conv.
rubber sealant waterproof4K/yr +42.2%0.9% conv.

All search terms

Top liquid rubber products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Liquid Rubber Waterproof Sealant DIY Leak Repair Coating for Flat Metal & Low Slope Roofs Foundations Gutters & More Flexible Protective Membrane - Black - 1 Gallon

Liquid Rubber$68.974.4★4,134 rev

Flex Seal Liquid Rubber Coating Sealant Waterproof Flexible Breathable and UV Resistant Roof Repair Basements RV Campers Trailers Marine EPDM Masonry Black 16 oz

Flex Seal Liquid$18.294.5★2,242 rev

Liquid Rubber Waterproof Sealant DIY Leak Repair Coating for Flat Metal & Low Slope Roofs Foundations Gutters & More Flexible Protective Membrane - Black - 1 Quart

Liquid Rubber$34.554.4★4,134 rev

Liquid Rubber Waterproof Sealant DIY Leak Repair Coating for Flat Metal & Low Slope Roofs Foundations Gutters & More Flexible Protective Membrane - Black - 5 Gallon

Liquid Rubber$199.114.4★4,134 rev

Permatex 81158 Black Silicone Adhesive Sealant 3 oz. Tube Pack of 1

Permatex$5.834.6★11,770 rev

Newest

by launch date

Avenuebool Liquid Electrical Tape 4oz Waterproof Liquid Tape Electrical Insulating Glue with Brush Cap High Temperature Resistant Flexible Rubber Coating for Wires Cables Plug Automotive(Black)

Avenuebool$9.2163 rev

8mo ago

Matvio Black Liquid Rubber Waterproof Coating 1 Quart | Industrial Grade Foundation & Flat Roof Sealant | Waterproofing Membrane for Concrete Wood & Metal | UV Resistant | Leak Repair Paint

matvio$21.6361 rev

8mo ago

Xinyet 150ml Tool Dip Rubber Coating Rubber Dip for Tools Waterproof Flexible Peelable Protective Coating Black Slip Resistance Breathable for Pliers and Tools DIY Craft

Xinyet$9.9457 rev

11mo ago

Rubber Liquid Waterproof Sealant TUFINEIN 53oz/1.5kg Neutral Gray Quick Drying Multi Surface Foundation Leak Repair - Roof Gutters Basement Sealer Waterproof - Indoor & Outdoor Flexible Rubber Paint

Tufinein$35.36282 rev

1y ago

WANJAO Tool Dip Rubber Coating Liquid Rubber Dip Flexible Peelable Protective Coating Rubber Coating Sealant Waterproof Flexible Slip Resistance for DIY Craft 150g Black Bottle Open Size 1 Inch

WANJAO$13.42122 rev

1y ago

What buyers say about liquid rubber

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall21%

“still reliable is a solid proof of its quality”

Advertised Vs Actual Product10%

“Works exactly as advertised”

Ease Of Use10%

“Easy to Use”

Efficiency9%

“it works great”

Adhesion/Stickiness7%

“Sticks well”

Leak-Proof6%

“it has not leaked”

Value For Money5%

“Great value”

Durability4%

“Very Durable”

Water Resistance3%

“This is a great, high quality way to keep your connections waterproof, safe, and secure”

Ease Of Cleaning1%

“Cleans up pretty easy too for any mess you make”

What buyers complain about

Leak-Proof11%

“Leaking tube”

Functionality-Overall8%

“Didnt work as expected”

Quality-Overall7%

“Garbage product”

Ease Of Use7%

“unable to use”

Adhesion/Stickiness7%

“Bad adhesive”

Value For Money6%

“Kinda expensive, not a lot of coverage,”

Ease Of Cleaning6%

“A mess”

Thickness5%

“It was thick”

Size-Overall5%

“the smaller sized bucket is much smaller than it appears in the picture”

Spray/Flow3%

“Can spray does not work”

Top return reasons

Color12%

Advertised Vs Actual Product11%

Compatibility-Overall10%

Leak-Proof9%

Functionality-Overall7%